Definition of -blast in English:

-blast

combining form

Biology
1Denoting an embryonic cell: erythroblast Compare with -cyte.
1.1Denoting a germ layer of an embryo: epiblast

Origin

from Greek blastos 'germ, sprout'.

Definition of -blast in:

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Word of the day demoralize
Pronunciation: dɪˈmɒrəlʌɪz
verb
cause (someone) to lose confidence or hope